A1 Journal article (refereed), original research

Arsenic (III) removal from water by hydroxyapatite‐bentonite clay‐nanocrystalline cellulose

Publication Details
Authors: Hokkanen Sanna, Doshi Bhairavi, Srivastava Varsha, Puro Liisa, Koivula Risto
Publisher: Wiley: 12 months
Publication year: 2019
Language: English
Related Journal or Series Information: Environmental Progress and Sustainable Energy
ISSN: 1944-7442
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication


In the present study, natural, non‐toxic nano size adsorption material:
hydroxyapatite‐bentonite clay‐nanocrystalline cellulose (CHA‐BENT‐NCC)
was successfully prepared for As(III) removal from water solution. The
efficiency of this composite material was investigated as a function of
solution pH, time, As(III) concentration, and temperature. The chemical
and morphological structures of adsorbent were investigated by scanning
electron microscopy (SEM), energy dispersive analysis of X‐rays (EDAX),
transmission electron microscopy (TEM), X‐ray diffraction (XRD),
and Fourier‐transform infrared spectroscopy (FTIR). Results of the
kinetic study revealed that the adsorption rate was very high in the
beginning and over 95% of As(III) removal was achieved within the first 5
min. The kinetics of As(III) on CHA‐BENT‐NCC complied with the
pseudo‐first‐order model. The maximum uptake was 51.01 mg/g by Langmuir
model and 48.99 mg/g by Dubinin–Radushkevich model. The preservation of
As(III) specification was studied as function of time using three
different storage method.

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Last updated on 2020-20-03 at 10:03